Since the postfix ++ exists in languages, the following will always make v[0] ← v[1]: Now with destructuring assignment, it’s different – I could only test with Chrome and Firefox: Both would end up with i expected value of 1. I tried many other king of variable assignments in the left part of a d…
Tag: destructuring
TypeScript destructure array of objects, both first object and a value within it
I have an array of objects I want to destructure, retrieving both the first object and a value within it: In Javascript this works; but in TypeScript this returns I’m trying to figure out how to type that in order to avoid the error. Answer As firstObjectInArray isn’t part of your declaration (it&…
Destructuring a function call
Assuming the following code: EsLint gives out the following error: While the current code is clear and concise, if I still wanted to destructure the code and make EsLint happy, how could I do it ? Answer The docs for this rule say that properties of props should be destructured before using them, so just do t…
How can I ignore certain returned values from array destructuring?
Can I avoid declaring a useless variable when array destructuring when I am only interested in array values beyond index 0? In the following, I want to avoid declaring a, I am only interested in index 1 and beyond. Answer Can I avoid declaring a useless variable when array destructuring when I am only interes…
Using destructuring to define optional parameters in ES6
I have a function that performs an AJAX call, as such: Where the second parameter is optional, i.e. in some cases that parameter is required, in others it isn’t: and: In the second instance I’d like to be able to omit the undefined parameter and I believe assigning options/defaults by way of destr…
object destructuring: how to use intermediate nested property
Is there a way to get access to all three in one destructuring call? I want to avoid two calls like so: Answer The closest I can come up with is: Though I’d use let instead, if I’m using ES6 😉
One-liner to take some properties from object in ES 6
How one can write a function, which takes only few attributes in most-compact way in ES6? I’ve came up with solution using destructuring + simplified object literal, but I don’t like that list of fields is repeated in the code. Is there an even slimmer solution? Answer Here’s something slimm…